Handheld scanners are hand-held scanning devices for scanning flat originals of graphics, texts or photos. The scanning device consists of a row ofCCD sensors and an illumination device.
The CCD sensors, which are mounted over the entire scanning width, detect the reflection of the printed original caused by the illumination. To ensure that the different guide speeds do not affect the scanning process, a guide roller is located on the underside, via which a clock signal is generated for the line feed.
Since the accuracy and scanning width (max. 10 cm) of hand-held scanners leaves much to be desired compared to modern flatbed scanners, they are now only used as barcode or barcode readers, for example for registeringEAN codes in warehouses.